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DS3903 데이터시트(PDF) 1 Page - Maxim Integrated Products |
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DS3903 데이터시트(HTML) 1 Page - Maxim Integrated Products |
1 / 11 page General Description The DS3903 contains three nonvolatile (NV) low tem- perature coefficient digital potentiometers, which can be accessed through a 2-wire bus. It operates in both 3V and 5V systems, and it features a write-protect pin that can lock the positions of the potentiometers. An address pin allows two DS3903s to be placed on the same 2-wire bus. Applications Power-Supply Calibration Mobile Phones and PDAs Fiber Optics Transceiver Modules Portable Electronics A Small, Low-Cost Replacement for Mechanical Potentiometers Features ♦ Three 128-Position Linear Potentiometers (Two 10k Ω, One 90kΩ) ♦ NV Wiper Storage ♦ 0 to 5.5V on Any Potentiometer Terminal Independent of VCC ♦ Low End-to-End Temperature Coefficient ♦ Operates on an Industry-Standard 2-Wire Bus ♦ Write-Protect Pin ♦ Supply Voltage: 3V or 5V ♦ Operating Temperature Range: -40°C to +85°C ♦ Packaging: 20-Pin TSSOP Triple 128-Position Nonvolatile Digital Potentiometer _____________________________________________ Maxim Integrated Products 1 20 18 17 16 15 14 13 11 1 3 4 5 6 7 8 10 12 9 SDA VCC 19 2 SCL N.C. N.C. N.C. N.C. H0 W0 H1 H2 W2 TSSOP A0 WP W1 N.C. L0 L1 L2 GND DS3903 Pin Configuration 0.1 µF 4.7k Ω 2-WIRE MASTER VCC VCC VCC VREF1 VREF2 5.1k Ω Iref VCC SCL SDA POTENTIOMETER 2 10k Ω ADDDR FAh POTENTIOMETER 0 10k Ω ADDDR F9h POTENTIOMETER 1 90k Ω ADDDR F8h WP A0 GND 4.7k Ω VARIABLE RESISTANCE FOR ADJUSTABLE CURRENT SOURCE HIGH-OUTPUT-IMPEDANCE VOLTAGE REFERENCE BUFFERED VOLTAGE REFERENCE VCC MAX427 DS3903 Typical Operating Circuit Ordering Information Rev 0; 6/02 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. PART TEMP RANGE PIN-PACKAGE DS3903E-020 -40°C to +85°C 20 TSSOP DS3903E-020/T&R -40°C to +85°C 20 TSSOP (Tape-and-Reel) |
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